# Codecademy's Python 2 Course

https://www.codecademy.com/courses/learn-python/lessons/python-syntax/

It's gratis and accepts Python 3 syntax.

# Object-oriented

"The main goal of an object oriented language is to make code reusable – we do this through the use of classes and objects. If we want to design a new type of car, we can start with what they all have in common: wheels, seats, a frame. Now that we’ve determined what cars have in common, we can more easily implement any type of car we want by starting from that basic blueprint."

https://discuss.codecademy.com/t/what-does-it-mean-that-python-is-an-object-oriented-language/297314

# Errors (ex5)

"Mismatched quotes will cause a SyntaxError'

"SyntaxError: EOL while scanning a string literal"

No quotes will cause a NameError (interprets strings as commands. )

# Math (ex6)

```
mirthful_addition = 12381 + 91817
amazing_subtraction = 981 - 312
trippy_multiplication = 38 * 902
happy_division = 540 / 45
sassy_combinations = 129 * 1345 + 120 / 6 - 12
```

## Find the remainder of a number using %

```
is_this_number_odd = 15 % 2
is_this_number_divisible_by_seven = 133 % 7
```

# Updating variables / operators.

```
sandwich_price += sales_tax
```

is the same as:

```
sandwich_price = sandwich_price + sales_tax
```

but is much shorter.

## Comments

Are indicated by # or """This is not for running"""

# Numbers

An integer is like `5`, a float is a number with a decimal point like `5.0`. They can also be in scientific notation like `2.3e7`

To make sure math like `7/2` = `3.5` is correct is by inputting it into Python like `7./2.` or `float(7)/2`

# Strings

Multi-line strings are marked by ```"""Mulit-
line
strings"""```

# Booleans (True/False)

True = int(1)
False = int(0)

# Fun Projects

Design a shop using Ex7 and Ex9 as a frame:

7:
```
money_in_wallet = 40
sandwich_price = 7.50
sales_tax = .08 * sandwich_price

sandwich_price += sales_tax
money_in_wallet -= sandwich_price
```

9:

```
cucumbers = 1
price_per_cucumber = 3.25
total_cost = cucumbers * price_per_cucumber
print(total_cost)
```